Battery Question

[timd38]

Look at when your car was built, vs when it was shipped to the dealership. Ford, if memory serves me, Ford has a 45 day stand test that says the battery can sit 45 days and still start the car. If it is more than 45 days, it needs to be charged with a battery charger, not the alternator of the vehicle. We would test them with a light bulb that simulated the draw of the vehicle when it is not being driven to validate the 45 day requirement.

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[timd38]

Not sure about this. Every standard battery I’ve seen for the S550 is rated at 590 CCA. Also if they marked it red it should have replaced on the spot.

The S550 has a physically smaller battery. The Mustang now has the same battery as many Ford vehicles including the F150 (XL and XLT), the Edge and several others. It is also a different technology. The S550 had a flooded battery and the S650 has an AGM battery.